• 농촌지도와개발
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• 제25권2호
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• pp.85-97
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• 2018

This study aims to investigate the farmer's educational performances Influencing educational satisfaction. In general, the goal of agricultural education is to increase farm performance such as income, sales and perceptions. A survey was used to collect data from 588 farmers to the country extension office. The results of the analysis are as follows. The variables that have a significant effect on satisfaction in this study are as follows. interaction between instructors and farmers, passion of instructors, effectiveness of lectures, educational support, and educational facilities. However, the adequacy of the lecture and the diversity of the contents of education did not explain the satisfaction variable. Discussions on the improvement of farmers' education were made by considering the rejected variables. In conclusion, farmers' education in the field should secure educational diversity. And farmer's education in RDA should develop a new curriculum. Farmer's education in RDA should further strengthen the informal learning.

• 한국식물병리학회:학술대회논문집
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• 한국식물병리학회 2003년도 정기총회 및 추계학술발표회
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• pp.24-24
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• 2003

Since Rice bacterial grain rot (RGBR) was reported at 1986 in Korea, it has been severely occurred in 1994, 1995, 1998, and especially around 16,609 ha in 2000, and became a major disease in rice cultivation field. This study was focused on investigation of ecology of RGBR, weather conditions that affect development of epidemics, and development of an effective RGBR forecast system based on weather conditions during the rice heading period.(중략)

• 한국작물학회지
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• 제43권4호
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• pp.254-258
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• 1998

Distribution and occurrence of weedy rice in Kyonggi region were surveyed in 1996. Weedy rice was observed in 1368 fields (54.9%) of total 2490 fields. Almost two thirds of paddy fields in northern mountainous region were contaminated by weedy rice and more severe contamination, three forths of paddy fields, was observed in suburban regions. In those regions, occurrence of weedy rice was greater than those in north-eastern inland and south-western plain regions. The occurrence of weedy rice was higher in water seeding cultivation (66.7%) than other cultivation methods. The number of weedy rice per 10a was 756.7 plants in direct seeding on dry paddy and 379.4 plants in water seeding. The occurrence of weedy rice was higher in fields planted by farmer's seeds than that of paddy fields cultivated by certified seeds, and the longer the farmer's seeds being used, the more weedy rice occurred in paddy field.

• 대한수학회논문집
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• 제33권2호
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• pp.397-408
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• 2018

It is well-known that quasi-$Pr{\ddot{u}}fer$ domains are characterized as those domains D, such that every extension of D inside its quotient field is a primitive extension and that primitive extensions are characterized in terms of INC-extensions. Let $R={\bigoplus}_{{\alpha}{{\in}}{\Gamma}}$ $R_{\alpha}$ be a graded integral domain graded by an arbitrary torsionless grading monoid ${\Gamma}$ and ${\star}$ be a semistar operation on R. The main purpose of this paper is to give new characterizations of gr-${\star}$-quasi-$Pr{\ddot{u}}fer$ domains in terms of graded primitive and INC-extensions. Applications include new characterizations of UMt-domains.

• 농촌지도와개발
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• 제16권1호
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• pp.51-67
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• 2009

This study was carried out to investigate the major factors of the successful development of Doi Chaang Coffee Complex, Chiang Rai of Thailand. Data were gathered through field survey, library research and internet so on. Interviews were conducted with specialist, community leaders, board member of Doi Chaang Coffee Company from 14 to 19, January 2007. The major factors for the successful development observed were as follows: 1) Successful selection of crops and farming system(SALT) with regards of slopes and meteorological condition; 2) Leadership of the King of Thailand and the chief of Akha in terms of attitudinal change of hill-tribes in agriculture extension; 3) supporting by Royal Project Foundation; 4) Quality control through post harvest management by cooperative system; 5) Cooperation between the Coffee Producers' Cooperatives of Thailand and for the international Doi Chaang Coffee Corporation of Canada in terms of fair trade and so on.

• 식물병연구
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• 제21권1호
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• pp.6-11
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• 2015

고추 탄저병 요방제 수준을 설정하기 이하여 시험한 결과 노지 고추 수량에 영향을 주지 않는 수준의 탄저병 방제적기는 발생정도가 0.9% 이하이었으며, 노지고추 탄저병 발생정도와 수량과의 회귀식은 Y = -16.83X + 327.57, $R^2=0.83$ 성립하였다. 비가림 재배(무강우 조건) 고추의 수량에 영향을 주지 않는 수준의 탄저병 방제적기는 발생정도가 1.7% 이하이었으며, 고추탄저병 발생정도와 수량과의 회귀식은 Y = -4.92X + 361.02, $R^2=0.84$ 성립하였다. 비가림 재배(강우 조건) 고추의 수량에 영향을 주지 않는 수준의 탄저병 방제적기는 발생정도가 2.3% 이하이었으며, 고추 탄저병 발생정도와 수량과의 회귀식은 Y =-5.91X + 359.71, $R^2=0.76$ 성립하였다.

• 한국구조물진단유지관리공학회 논문집
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• 제22권3호
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• pp.60-68
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• 2018

주택법에 근거하여 철근콘크리트 공동주택의 리모델링 시 최대 3개층의 수직증축 및 기존 세대수의 15%까지 증축이 가능하게 되었다. 수직증축 리모델링 가능 여부는 안전진단 기준 및 매뉴얼을 바탕으로 기울기 및 침하, 내하력, 내구성 평가 부문에 대한 조사를 통하여 평가하고 판정하도록 되어 있다. 그러나 현행 증축형 리모델링 안전진단 기준 및 매뉴얼은 재건축 안전진단 기준과 비교하여 조사대상표본 수를 증대시키는 등 보수적인 것으로 평가되고 있으며, 특히 내구성 평가 부문에 검토 및 개선이 필요한 것으로 생각된다. 따라서 본 연구에서는 수도권 지역 공동주택의 증축형 리모델링 안전진단 조사 사례에 대한 내구성 조사 항목 중 콘크리트 탄산화를 대상으로 통계적인 수법에 의해 표본 수 합리화 방안을 제시하였다.

• 한국자원식물학회:학술대회논문집
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• 한국자원식물학회 2022년도 추계학술대회
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• pp.51-51
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• 2022

Water dropwort (Oenanthe stolonifera DC.) is a perennial herbaceous plant that grows wild throughout Korea. As of 2020, 24,819 tons (51.7% of open field, 48.3% of facility) are produced in 1,278 ha (59.9% of open field, 40.1% of facility) nationwide. Water dropwort, which is rich in nutrients such as vitamins and iron, is mainly cultivated by vegetative propagation method using local traditional species, however, seed propagation and breeding of cultivars are insufficient so far. Since securing, propagating and continuous characterization of various genetic resources are required to breed new cultivars, this study was conducted to compare the main characteristics of domestic genetic resources and to improve their utilization. Growth characteristics such as plant height, fresh weight, plant type, and flowering date were investigated for the 89 varieties of genetic resources owned by Jeollabuk-do Agricultural Research and Extension Services after vegetative propagation in the individual pots. Also, the morphological image information of leaves and flowers was constructed. Genetic resources were collected nationwide and originated in 30 regions including Hwaseong, Siheung and Jeju. Their plant types could be classified into straight, intermediate and creeping types according to their morphological characteristics, and at this time, the number of intermediate types accounted for the largest proportion. Flowering was carried out under high-temperature and long-day conditions in summer. According to the flowering date, they could be classified into early, middle and late flowering varieties, and at this time, the middle flowering varieties occupied the largest proportion. As a result of the investigation of vegetative growth characteristics, varieties with long plant height, heavy fresh weight and thick stem thickness were identified. Along with this result, it is thought that classification and selection of genetic resources for various purposes will be possible through additional investigations such as analysis of components and antioxidant activity. Moreover, it is judged that such results can be used as basic data for breeding new water dropwort cultivars in the future.

• 한국균학회지
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• 제50권2호
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• pp.93-102
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• 2022

국내 톱밥재배용 우수 품종을 육성하기 위해 기존의 육성품종과 수집 우수계통으로부터 단포자 교배를 통해 육성한 '자담'의 주요 특성은 다음과 같았다. 균사생장 적온은 22-25℃, 발이 및 생육온도는 13-20℃이었으며, 자실체 형태는 '평반구형', 발생형태는 '산발형'으로 나타났다. '자담'은 배양기간 25일, 갈변기간 86일, 발이기간 4일, 생육기간 7-9일로 첫주기 버섯 수확까지 총122-124일 소요되었고, 대조품종보다 발이기간이 2일 짧았다. '자담'의 3주기 평균 개체중은 44.6 g으로 대조품종과 유사하였고, 평균 유효개체수가 대조품종 보다 2.1개 많아 총수량이 623.8 g으로 대조품종(455.2 g)대비 약 37% 높은 수량을 보였다. '자담'의 자실체는 대조품종 대비 갓 두께는 유사하였으나, 대의 길이와 굵기가 작았다. 실증 결과, '자담'은 배양기간 26일, 갈변기간 84일로 대조품종(L808)에 비해 배양기간이 10일 짧았으며 2주기 총수량이 543.3 g으로 대조품종과 유사한 결과를 보였다.

• 한국토양비료학회지
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• 제45권4호
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• pp.540-543
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• 2012

농업 부문에서 온실가스 배출량을 줄이기 위하여 녹비작물인 헤어리베치와 바이오숯을 이용하였을 때 밭작물 재배지에서 아산화질소 배출량 저감 효과를 평가하였다. 질소 시용량은 고추의 표준 시비량인 $190kg\;ha^{-1}$이었으며, 주 2회 시료를 채취하여 GC/ECD로 아산화질소를 분석하였다. 대조구인 질소질 비료(요소) 처리구의 아산화질소 배출량은 $1.14kg\;N_2O-N\;ha^{-1}$이었으며, 헤어리베치와 바이오숯+질소질 비료 처리구의 아산화질소 배출량은 각각 $0.61kg\;N_2O-N\;ha^{-1}$과 $0.86kg\;N_2O-N\;ha^{-1}$로 온실가스 배출을 각각 46.5%와 24.6% 줄였다.